I'm testing some vulnerabilities on a machine which has the port 22333 opened (it's used as the ssh port, and I can connect to it without any problem and the telned command get connected):
$ telnet ...

Having trouble firewalking. I am trying to determine all the open ports on my firewall/gateway. Here is my lab network diagram:
(Skip to the bottom of the following explanation for a direct list of ...

I looked about but couldn't find a similar enough question.
I have some remote servers positioned on clients networks, which provide various services (raspberry pi) - and their firewall config is as ...

As far as I understood rpcbind is used for listing active services, and telling the requesting client where to send the RPC request. If a host listens on port 111, one can use rpcinfo to get program ...

I am doing some research and I need a very quick way to scan for open ports on a single machine. To provide some context, I know that my machine will have a port open waiting for UDP packets for about ...

I need a malware expert here. I am being targeted by advanced hackers over the 4.5 years.
So this is my situation:
1) My new phone:
I just bought a new phone, with SIM card and mobile internet plan ...

I was considering setting up a software firewall (pf) on my web server and did some research on them. Were I to do it, it'd involve basically blocking connections to all ports except 80, 443, and the ...

I understand nmap by default scans the top 1k 'most common' ports (-F reduces to 100)
I understand it gets these 'most common' ports based on the nmap-services file, specifically the frequency (3rd ...

I just read this example and explanation (below) in the OReilly book Security Power Tools (2007) in section 6.3 that is written by the creator of Scapy, Philippe Biondi. I think the example is very ...

I use my university internet network and all incoming connection is blocked on every port.(they use netasq firewall) They have no other restrictions which stops me from using a torrent client. Using ...

It's become standard fare for security minded organisations to block everything other than 80 and 443. As a result, more and more applications (other than web browsers) are learning to use these ports ...

Unpatched software poses no risk by themselves. They're only problematic when someone exploits it.
How could malware get into my system if I do have unpatched software in general and I'm connected to ...

I am thinking about forwarding port 22, to 22 on the machine behind router, but is it safe? Anyone can try to connect to my public IP on port 22 and then indefinitely try to guess user and password.
...

This question stems from my other question, sorry if it is too similar. Now I would like to know what mechanism is used to sandbox network processes and (if relevant) individual programs, if at all?
...

I'm doing a project for my high-school and I'm trying to get the best security for my network.
I've made almost everything in my access-point configuration and I have only 3 tcp/ports open on my AP: ...

nmap has the capability to guess the operating system with the option -O.
I was highly surprised that it can find the correct kernel or service pack.
* How nmap guesses the operating system?
* What ...

Hi basically I'm doing a vulnerability assessment for at the moment. The setup includes a DMZ with a single firewall and an internal network (3 legged network model employing a single DMZ) but on the ...

I've been diving into OSSEC for the last couple of months, but I feel unclear on one of it's alerts. I've provided the alert below. The main difference I see in previous output and current output is ...

I am doing some egress monitoring on my computer. Once in every few days, I would find some strange connections being logged, which I believe is initiated by the web browser through a related but not ...

I have client / server and there is a firewall between them.The server is listening on a port and I want to check if this port is allowed by the firewall.
I can only know the ports that the machine ...

If a computer (running different services such as ftp and ssh) is placed on a Demilitarized Zone, will all of its services automatically be accessed by anyone on the internet?
If the answer is yes, ...

I have run a port scan against a Thomson 789vn router and have noticed to my surprise that its HTTP as well as telnet and FTP ports are open.
How can one turn off telnet (also FTP) using the router's ...

The title is really bad, but I was able to find better. I have installed Debian on VMware, and set iptables to block any traffic except port 80 (inbound and outbound). When I run a nmap scan it shows ...

Is there any reason why an -sS scan (or most others) would not report an open port that doesn't have a service attached to it?
For example, in a regular -sS scan, the following port will be missing, ...

I use VPN quite often in public places where I don't want anyone to read my web traffic. However, some public places have firewalls that block ports required to establish a VPN connection (I usually ...